How to reduce slop on mainshaft? trying to rebuild gearbox nice and proper and noticed that i could push and pull the main shaft significatly(about 1/4 inch) when the pinion shaft is solidly in place. Looking at the parts catalog there are only two places on the main shaft that call for shims, doesnt seem like switching out to the largest thickness for both of them will take up enough of the slop. First time doing this. Am i overlooking something simple? Have not purchased any replacement pieces yet.